<template>
  <div class="rank" ref='rank'>
    <Scroll class="toplist" :data='topList' ref='toplist'>
      <ul>
        <li class="item" v-for="(item,index) in topList" 
        :key="index" @click="selectItem(item)">
          <div class="icon">
            <img width="100" height="100" v-lazy="item.picUrl"/>
          </div>
          <ul class="songlist">
            <li class="song" v-for="(song,index) in item.songList" :key="index">
              <span>{{index + 1}}.</span>
              <span>{{song.songname}}-{{song.singername}}</span>
            </li>
          </ul>
        </li>
      </ul>
      <div class="loading-container" v-show="!topList.length">
        <loading></loading>
      </div>
    </Scroll>
    <router-view></router-view>
  </div>
</template>

<script type="text/ecmascript-6">
  import {getTopList} from '../../api/rank'
  import {ERR_OK} from '../../api/config'
  import Scroll from '../../base/scroll/scroll'
  import Loading from '../../base/loading/loading'
  import {playlistMixin} from 'common/js/mixin'
  import {mapMutations} from 'vuex'

  export default {
    mixins:[playlistMixin],
    data() {
      return {
        topList:[]
      }
    },
    created() {
      this._getTopList()
    },
    components:{
      Scroll,
      Loading
    },
    methods:{
      handlePlaylist(playlist) {
        const bottom = playlist.length ? '60px' : ''
        this.$refs.rank.style.bottom = bottom
        this.$refs.toplist.refresh()
      },
      _getTopList() {
        getTopList().then((res) => {
          if(res.code === ERR_OK) {
            this.topList = res.data.topList
          }
        })
      },
      selectItem(item) {
        this.$router.push({
          path:`/rank/${item.id}`
        })
        this.setTopList(item)
      },
      ...mapMutations({
        setTopList: 'SET_TOP_LIST'
      })
    }
  }
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
  .rank
    position :fixed
    width :100%
    top: 88px
    bottom :0
    .toplist
      height: 100%
      overflow hidden
      .item
        display :flex
        margin :0 20px
        padding-top :20px
        height :100px
        &:last-child
          padding-bottom:20px
        .icon
          flex 0 0 100px
          width 100px
          height 100px  
        .songlist
          flex 1
          display flex
          flex-direction column
          justify-content center
          padding 0 20px
          height 100px
          background #333333
          overflow hidden
          .song
            font-size 12px
            color rgba(255,255,255,0.3)
            line-height 25px
            overflow: hidden;
            white-space: nowrap;
            text-overflow: ellipsis;
    .loading-container
        position: absolute
        width: 100%
        top: 50%
        transform: translateY(-50%)      
</style>